Rivet-holding device.



D. C. DOWDY.

RIVET HOLDING DEVICE.

APPLICATION FILED JAN.25,1913.

1,105,892, Patented Aug. 4, 1914 WITNESSES `HVVENTO THE MORRIS PEYRS C0AA PHOTuLITHo.. WASHINUIUN. D. C.

" ITE f DORIN CO'RBETT LDOWDY, OF I'IUNTINGTON,"NEST VIRGINIA.

RIVET-IIOLDING DEVICE.

Specification of Letters Patent.

latented Auw. 4f, 1914.

Application filed January 25, 1913. Serial No. 744,118.`

To all whom t may concern Be it known that I, DonrN Connn'rr Downr, a citizen ott' the United States, residing at Huntington, in the county of Cabell and State of `West Virginia, have invented new `and useful Improvements in Rivet- Holding Devices, of which the following is a specification.

rlhis invention relates to the class of rivet ing appliances and more specifically to a rivet holder adapted for use in connection with boiler rivetspwherein the spaceaiford ed for such operation is very limited.

The primary object of my invention is to provide a rivet holding` device of such novel and peculiar construction` as to effectively hold within a boiler tube, fire-box or the like, a heatedrivet, in such a manner as to prevent slippingt-hereof while the rivet is being poundedby 'any other suitable means.`

Another object of my invention is to provide a device of this character which is not only simple in construction but reliable and efficient in operation, and` one which can `be manufactured and placed upon the market at a minimum cost.

Heretofore, it has been necessary to use what is commonly known as a wedge-ba1" for holding heated rivets in proper place during' the construction of a boiler. and upon practical application, it has been found that such a tool very often slips allowing the rivet to become cool, thereby requiring` that same be cut-out and replaced, which is not only expensive but exceeding troublesome; while, whereas, with my device these and other objectionable features are thoroughly overcome and therivet is rigidly held in proper place until the riveting' operation has been entirely completed, whereupon the device is removed.

With the above `and other objects in view, my invention relates to such details of construction and in the arrangement and com- `bination of the several. parts as will be hereinafter' fully described and specifically pointed out in the appended claims.

In describing' my invention in detail reference will be had to the accompanying `drawings wherein like characters denote like or corresponding parts throughout the sev* eral views7 and in which Figure l is a side elevation partly broken away showing the device complete. Fig. 2

`is a section on line a-a of Fig.` 1, and Fig'.

3 is an elevation of one end of the device.

In the accompanyingl drawings wherein is illustrated the preferred form of my invention, thc ruimerel l designates a suitable air receptacle `or compression chamber, covered at its forward and rear ends by caps 2 `and 3 respectively, the latter having' an air inlet pipe 4L in conductive relation therewith. A valve of the tl'rce way turning' plug type is provided in the inlet pipe whereby air may be admitted to the chamber and cX hausted therefrom when occasion requires.

The caps above referred to have provided thereon diametrically opposite ears 6 through which are journaled parallel extending rods 7, the latter havino' head portions 8 `formed at their rear ends, while eye. lets 9 are provided at their forward extremitics. The lcnfzth of the rods is considerably greater than the distance between the caps so that the eyelets 9 are disposed slightly beyond one of the caps thereof.

A pair of spaced apart parallel extending arms 10 are provided which are formed inteffral at their rear ends as shown atV 11, they being held in rigid relation with the cap 2 through the cooperation of a transverse pin 1l carrying head portions `l2, with the eyelets 9 and rods 7.

Operative within the air chamber is a plunger head 12', from which projects a piston rod 13, the latter extending through the cap 2 and body portion of the arms l0 and disposed between the arms as is clearly shown. A coil spring 14 is also provided for the purpose of normally holding the plunger in its rearmost position within the chamber, so that when air under pressure is admitted to the cylinder', the piston rod will be forced between the arms as is obvious. The forward ends of the arms are formed substantially wodgeshaped as shown at 15,

gagement with a rivet 17, a head portion 18 is provided upon one of the arms and has a slightly concaved face as is apparent.

In the oper: tion of my invention in connection with the riveting in boilers of the ordinary type, the device is first disposed between the tubes of the boiler, the arms being disposed in engagement With one of the tubes and the head of a rivet, the latter extending through the crown sheet or any structure connected therewith'. Air and pressure is then introduced into the cylinder which Will move the piston rod from its original position and consequently force the arms apart so that the rivet is securely held in placey What l claim as new and desire to secure by Letters Patent, is

l. In a device of the character described, the combination with an air chamber and a piston operating therein, of a rod operable through movement of said piston, arms arranged in parallel relation and in line vvith the movement of said rod, and means upon said rod and engaging said arms for forcing l the same apart., as and `for the purpose set 'forth ment of saidl piston and engageable with said arms tor forcing the Wedge-shapedv extremities apart, as and for the purpose set forth. .l

3. vIn a device of the character described,

the combination with an air chamber and av piston operating therein, of a rod operablethrough movement of said piston, arms arranged in spacedrelation and in line with the movement of said rod, said arms being Wedge-shaped at their outer extremity, a rivet holding yelement upon the extremity of oneof said arms, of a Wedge-shaped head formed upon the free end of .said rodand engageable with the Wedge-shaped extremities of the respective arms for forcing the latter apart, as and for the purpose set forth. DORIN CORBETT DOXVDY.V lVitnesses. v y

H. QR. VYONT, o H. W. Bras.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D.' C. 

